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  • 1
    ISSN: 1573-1561
    Keywords: Coleoptera ; Scarabaeidae ; Anomala octiescostata ; (R,Z)-5-(−)-(oct-1-enyl)oxacyclopentan-2-one ; (R,Z)-5-(−)-(dec-1-enyl)oxacyclopentan-2-one ; GC-EAD ; Anomala cuprea ; Anomala albopilosa sakishimana ; flight activity ; Latin square
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Using GC-EAD, the sex pheromone of the scarab beetleAnomala octiescostata was identified to be a 8:2 binary mixture of (R,Z)-5-(−)-(oct-1-enyl)oxacyclopentan-2-one and (R,Z)-5-(−)-(dec-1-enyl)oxacyclopentan-2-one. These semiochemicals have been also reported as sex pheromone constituents of otherAnomala species, either geographically or seasonally isolated fromA. octiescostata. Synthetic sex pheromone was highly attractive in the field; 0.1 mg captured significantly more males than two virgin females. Buried traps were significantly more attractive than those positioned at 30, 90, and 150 cm above the ground. In a dose-response test (0.1–100 mg), no saturation due to overdose of pheromone was observed, but in most cases, two dosages differing by 10-fold were not significantly different. Response of males to traps baited with different ratios of the two components was tested in two experiments with randomized blocks and Latin-square designs. Deviation from the natural ratio (8:2) of sex pheromone did not significantly diminish the response of males. Peak flight activity of beetle was recorded at 9:00–10:00 AM JST on sunny days in the end of April 1993.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-1561
    Keywords: Coleoptera ; Scarabaeidae ; (R,Z)-5-(−)-oct-1-enyl)oxacyclopentan-2-one ; (R,Z)-5-(−)-(dec-1-enyl)oxacyclopentan-2-one ; (R,E)-5-(−)-(oct-1-enyl)oxacyclopentan-2-one ; Anomala albopilosa sakishimana ; Anomala octiescostata ; Anomala cuprea ; pheromone release ; GC-EAD
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Two components were identified in the sex pheromone system of the green chafter,Anomala albopilosa sakishimana Nomura: (R,Z)-5-(−)-(oct-1-enyl)oxacyclopentan-2-one (buibuilactone) and (R,Z)-5-(−)-(dec-1-enyl)oxyacyclopentan-2-one (japonilure), which have been previously identified as sex pheromone constituents ofA. cuprea andA. octiescostata. A female-specific minor component, (R,E)-5-(−)-(oct-1-enyl)oxacyclopentan-2-one, did not seem to be involved in pheromonal communication because it was not EAD active, but its role remained unclear. A synthetic blend of the two components captured significantly more beetles than any other treatments. Nevertheless, the fact that both the synthetic sex pheromone and field-captured female beetles were weak lures convinced us that the sex pheromone system may be only part of a complex communication system, probably involving plant volatiles. Although the sex pheromone was released during both the scotophase and photophase, there was an increase of 60% in the photophase.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 25 (1999), S. 1055-1066 
    ISSN: 1573-1561
    Keywords: Chiral GC-EAD ; enantiomeric discrimination ; Anomala octiescostata ; Anomala cuprea ; buibuilactone ; japonilure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The sex pheromone for Anomala octiescostata has been previously identified as a 4:1 mixture of (R)-buibuilactone and (R)-japonilure. Field experiments showed that although not active per se, the secondary component increased the activity of major component, buibuilactone. The enantiomers of these semiochemicals, i.e., (S)-buibuilactone and (S)-japonilure are neither attractants nor behavioral antagonists to the pheromone system of A. octiescostata. Chiral GC-EAD experiments demonstrated that, in marked contrast to the Japanese beetle and Osaka beetle, which can detect a stereoisomer not produced by their conspecific females, the male antennae of A. octiescostata lack olfactory receptor neurons (ORNs) tuned to (S)-buibuilactone. The same enantiomeric anosmia (inability to smell a compound) was also observed in Anomala cuprea male antennae. Both in a Y-olfactometer and field experiments, it was clarified that (S)-buibuilactone was not a behavioral antagonist for A. cuprea. Contrary to male antennae of both A. octiescostata and A. cuprea, which lack ORNs tuned to the nonnatural (S)-buibuilactone, fragrance evaluation by skilled perfumers revealed that the human nose can discriminate (both in intensity and quality) enantiomerically pure samples of (R)- and (S)-buibuilactone and japonilure.
    Type of Medium: Electronic Resource
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